CN103591068B - Spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor - Google Patents
Spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor Download PDFInfo
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- CN103591068B CN103591068B CN201310367465.6A CN201310367465A CN103591068B CN 103591068 B CN103591068 B CN 103591068B CN 201310367465 A CN201310367465 A CN 201310367465A CN 103591068 B CN103591068 B CN 103591068B
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- spool
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- servo motor
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Abstract
Spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor, comprise spool, spool is placed in valve pocket, the top of valve pocket is connected with lower cover plate, lower cover plate lower end surface and spool end form cavity, have center hole in spool to be connected with cavity, spool top is processed with outside thread through the valve rod of lower cover plate center hole, be connected with long nut, long nut is connected with servo motor rotor, the lower end surface of actuating motor shell is connected with lower cover plate, top board lower end is pressed on actuating motor shell upper-end surface, screw thread is opened at the two ends that long nut is positioned at top board and lower cover plate, face-to-face angular contact ball bearing is installed, rotary transformer rotor is installed in the outer end that long nut stretches out top board, rotary transformer stator is fixed by cover plate and top board, the slip screw organisation conversion that the rotary motion of servo motor rotor is made up of long nut and spool top becomes the straight line motion of spool, the opening and closing realizing valve is rotated by controlling motor, the present invention improves precision, reduce costs.
Description
Technical field
The present invention relates to electrohydraulic control technical field, be specifically related to spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor.
Background technique
Traditional electrohydraulic control is made up of electricity-machine transducer, hydraulic amplifier and feedback detection, in the occasion of large discharge, the use of multistage valve is comparatively extensive, and it contains guide's step valve as controlled stage, and pilot valve often adopts the structures such as nozzle baffle type, jet pipe type and sliding valve style.The life and reliability of traditional servo valves and the pollution level of hydraulic oil closely related, the hydraulic system of installing servovalve must thoroughly be cleaned, nozzle baffle type and jet pipe type require very high to fluid, clean level needs at 5 below μ, and servovalve is contaminated is the main reason causing servovalve to lose efficacy.In addition, there is the large and problem such as serious of generating heat of electromagnet size in the proportion electro-magnet adopted in electro-hydraulic proportional valve, and electromagnetism the suction-combining force is difficult to reach the requirement under some high-pressure systems.
In recent years, cartridge valve is widely used in high-pressure high flux hydraulic power system, and the element of cartridge valve is also continuous to be developed to standardization and modularization.At present, the cartridge valve both at home and abroad for high-pressure high-flow place all adopts secondary or three grades of cartridge valves, and realized motion and the control of spool by pilot stage, proportional control technique combines with cartridge valve technology, forms two-way and threeway proportional cartridge valve.Feature is that structure is simple, reliable performance, and flow resistance is little, and oil filling capacity is large, is easy to realize integrated.But need extra oil hydraulic circuit and maintenance cost is higher, and Domestic market multistage cartridge valve technology is still immature.Particularly all have employed cartridge valve in the current large-scale forging equipment of numerous domestic and realize the function such as flow control, off-load, the operating conditions of these forging equipments makes to improve constantly the requirement of corresponding cartridge valve, and usually cannot reach requirement just because of auxiliary elements such as cartridge valves and limit the development of domestic forging equipment in tonnage and control accuracy.Although domestic many hydrovalve producers constantly carry out independent research, external import cartridge valve still accounts for the overwhelming majority in forging equipment field, and price is high, in a disguised form improves equipment cost.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of this invention is to provide spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor, being applicable to high-pressure high-flow and controlling place, improving precision, reduce costs.
For achieving the above object, the technical solution used in the present invention is:
Spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor, comprise spool 2, spool 2 is placed in valve pocket 1, the top of valve pocket 1 is connected with lower cover plate 3, lower cover plate 3 lower end surface and spool 2 end face form cavity, have center hole in spool 2 to be connected with cavity, spool 2 top is processed with outside thread through the valve rod of lower cover plate 3 center hole, be connected with long nut 5, long nut 5 is connected with servo motor rotor 6 by flat key 15, servo motor stator 7 outer wall and actuating motor shell 14 inwall glue connect, the lower end surface of actuating motor shell 14 is connected with lower cover plate 3, top board 8 lower end is pressed on actuating motor shell 14 upper-end surface, screw thread is opened at the two ends that long nut 5 is positioned at top board 8 and lower cover plate 3, angular contact ball bearing 9 is installed face-to-face, angular contact ball bearing 9 is by top board 8, lower cover plate 3 and sleeve 4 are located, rotary transformer rotor 13 is installed in the outer end that long nut 5 stretches out top board 8, rotary transformer rotor 13 is fixed by round nut 10, rotary transformer stator 12 is fixed by cover plate 11 and top board 8.
Described spool 2 is provided with guide ring and seal ring with valve pocket 1 cooperation place.
Described lower cover plate 3 is all provided with seal ring with valve pocket 1 and spool 2 cooperation place.
Described top board 8 has tapped hole, is fixed on valve seat 17 by whole outer valve by stud 16.
Described spool 2 and valve pocket 1 fitting surface have vertical slot, in groove, has steel ball.
The invention has the advantages that:
Actuating motor and valve body are made of one, and instead of original pilot valve system, greatly simplify structure, reduce volume, not only save the cost of oil circuit control, also make installing space more compact.
Spool and actuating motor by long nut as bindiny mechanism, the convert rotational motion of servo motor rotor is become the straight line motion of spool, form the rotor axis of electric of hollow type, rotate the unlatching realizing valve close by controlling actuating motor, more accurate and improve the working efficiency of whole hydraulic system to the control of valve.
Have center hole in spool to be connected with cavity, make inlet high pressure oil enter cavity inner equilibrium valve port pressure; Long nut both ends of the surface opposite is provided with angular contact ball bearing, the motor contact after carrying balance; Stud carrying high pressure oil is to the pressure of lower cover plate lower end surface.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in drawings, spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor, comprise spool 2, spool 2 is placed in valve pocket 1, the top of valve pocket 1 is connected with lower cover plate 3, lower cover plate 3 lower end surface and spool 2 end face form cavity, have center hole in spool 2 to be connected with cavity, inlet high pressure oil is made to enter cavity inner equilibrium valve port pressure, spool 2 top is processed with outside thread through the valve rod of lower cover plate 3 center hole, play the effect of screw rod, be connected with long nut 5, long nut 5 is connected with servo motor rotor 6 by flat key 15, servo motor stator 7 outer wall and actuating motor shell 14 inwall glue connect, the lower end surface of actuating motor shell 14 is connected with lower cover plate 3, top board 8 lower end is pressed on actuating motor shell 14 upper-end surface, screw thread is opened at the two ends that long nut 5 is positioned at top board 8 and lower cover plate 3, angular contact ball bearing 9 is installed face-to-face, angular contact ball bearing 9 is by top board 8, lower cover plate 3 and sleeve 4 are located, rotary transformer rotor 13 is installed in the outer end that long nut 5 stretches out top board 8, rotary transformer rotor 13 is fixed by round nut 10, rotary transformer stator 12 is fixed by cover plate 11 and top board 8, the slip screw organisation conversion that the rotary motion of servo motor rotor 6 is made up of long nut 5 and spool 2 top becomes the straight line motion of spool 2, the unlatching realizing valve by controlling motor rotation closes.
Described spool 2 is provided with guide ring and seal ring with valve pocket 1 cooperation place.
Described lower cover plate 3 is all provided with seal ring with valve pocket 1 and spool 2 cooperation place.
Described top board 8 has tapped hole, is fixed on valve seat 17 by whole outer valve by stud 16.
Described spool 2 and valve pocket 1 fitting surface have vertical slot, has steel ball in groove, avoid the rotary motion that spool is possible.
Working principle of the present invention is;
Valve port is initially located in closed condition, open motor, valve port A leads to high pressure oil, outlet B connects accumulator off-load, valve port A high pressure oil flows in the cavity that spool 2 and lower cover plate formed through the center hole of spool 2, make to act on the pressure on the upper surface area S2 of spool 2 and the pressure approximate equilibrium on lower surface area S1, actuating motor running is controlled by electrical signal, rotary motion is passed to long nut 5 by flat key 15 by rotor 6, long nut 5 rotates, the spool 2 upper screw part be mated does straight line motion, during unlatching valve port A, actuating motor band movable valve plug 2 moves upward, and obtain by rotary transformer the closed loop control that feedback signal realizes spool 2 action displacement, motor reversal during close port A, band movable valve plug 2 moves downward, until valve port is closed, more than achieve and closed by the unlatching of rotating servo motor control valve.
Claims (5)
1. spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor, comprise spool (2), spool (2) is placed in valve pocket (1), it is characterized in that: the top of valve pocket (1) is connected with lower cover plate (3), lower cover plate (3) lower end surface and spool (2) end face form cavity, have center hole in spool (2) to be connected with cavity, spool (2) top is processed with outside thread through the valve rod of lower cover plate (3) center hole, be connected with long nut (5), long nut (5) is connected with servo motor rotor (6) by flat key (15), servo motor stator (7) outer wall and actuating motor shell (14) inwall glue connect, the lower end surface of actuating motor shell (14) is connected with lower cover plate (3), top board (8) lower end is pressed on actuating motor shell (14) upper-end surface, screw thread is opened at the two ends that long nut (5) is positioned at top board (8) and lower cover plate (3), angular contact ball bearing (9) is installed face-to-face, angular contact ball bearing (9) is by top board (8), lower cover plate (3) and sleeve (4) location, rotary transformer rotor (13) is installed in the outer end that long nut (5) stretches out top board (8), rotary transformer rotor (13) is fixed by round nut (10), rotary transformer stator (12) is fixed by cover plate (11) and top board (8).
2. spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor according to claim 1, is characterized in that: described spool (2) and valve pocket (1) cooperation place are provided with guide ring and seal ring.
3. spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor according to claim 1, is characterized in that: described lower cover plate (3) is all provided with seal ring with valve pocket (1) and spool (2) cooperation place.
4. spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor according to claim 1, is characterized in that: described top board (8) has tapped hole, is fixed on valve seat (17) by whole outer valve by stud (16).
5. spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor according to claim 1, is characterized in that: described spool (2) and valve pocket (1) fitting surface have vertical slot, has steel ball in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310367465.6A CN103591068B (en) | 2013-08-21 | 2013-08-21 | Spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310367465.6A CN103591068B (en) | 2013-08-21 | 2013-08-21 | Spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103591068A CN103591068A (en) | 2014-02-19 |
| CN103591068B true CN103591068B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310367465.6A Expired - Fee Related CN103591068B (en) | 2013-08-21 | 2013-08-21 | Spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor |
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| CN (1) | CN103591068B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626925A (en) * | 2014-10-28 | 2016-06-01 | 北京精密机电控制设备研究所 | Driving mechanism for digital valve |
| CN106762908B (en) * | 2016-12-29 | 2018-11-06 | 宁波市鄞州通力液压电器厂 | Hydraulic control device and the method for flow control |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5249603A (en) * | 1992-05-19 | 1993-10-05 | Caterpillar Inc. | Proportional electro-hydraulic pressure control device |
| EP0574408B1 (en) * | 1991-03-08 | 1996-04-03 | SCHULZE, Eckehart | Process for actuating a slide valve designed as a magnetic valve, magnetic valve for carrying out said process |
| US5785087A (en) * | 1996-04-03 | 1998-07-28 | Ebara Corporation | Water hydraulic proportional control valve |
| CN1603635A (en) * | 2004-11-05 | 2005-04-06 | 宁波华液机器制造有限公司 | Proportional differential pressure control valve |
| CN201513406U (en) * | 2009-09-25 | 2010-06-23 | 浙江工业大学 | High-frequency high-flow 2D digital servo valve |
| CN102635582A (en) * | 2012-03-27 | 2012-08-15 | 西安交通大学 | High-pressure high-flow alternating-current servo direct-driven threaded flow valve |
| CN102878135A (en) * | 2012-09-18 | 2013-01-16 | 浙江工业大学 | Direct acting 2D electric-hydraulic proportional digital valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004009385A (en) * | 2002-06-04 | 2004-01-15 | Japan Steel Works Ltd:The | Hydraulic circuit of ultra high-speed injection molding machine |
| GB2438634B (en) * | 2006-06-01 | 2010-07-28 | Aker Kvaerner Subsea Ltd | Electrically operated hydraulic valve |
-
2013
- 2013-08-21 CN CN201310367465.6A patent/CN103591068B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0574408B1 (en) * | 1991-03-08 | 1996-04-03 | SCHULZE, Eckehart | Process for actuating a slide valve designed as a magnetic valve, magnetic valve for carrying out said process |
| US5249603A (en) * | 1992-05-19 | 1993-10-05 | Caterpillar Inc. | Proportional electro-hydraulic pressure control device |
| US5785087A (en) * | 1996-04-03 | 1998-07-28 | Ebara Corporation | Water hydraulic proportional control valve |
| CN1603635A (en) * | 2004-11-05 | 2005-04-06 | 宁波华液机器制造有限公司 | Proportional differential pressure control valve |
| CN201513406U (en) * | 2009-09-25 | 2010-06-23 | 浙江工业大学 | High-frequency high-flow 2D digital servo valve |
| CN102635582A (en) * | 2012-03-27 | 2012-08-15 | 西安交通大学 | High-pressure high-flow alternating-current servo direct-driven threaded flow valve |
| CN102878135A (en) * | 2012-09-18 | 2013-01-16 | 浙江工业大学 | Direct acting 2D electric-hydraulic proportional digital valve |
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| CN103591068A (en) | 2014-02-19 |
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